Too little water - drought
Droughts occur when a long period of abnormally dry weather leads to a severe water shortage. Droughts are also often caused by the activity of humans and can have devastating effects.
Human activities causing drought
Human activities that can help trigger droughts include:
- Widespread cutting down of trees for fuel reduces the soil’s ability to hold water - drying out the ground, triggering desertification [desertification: The spread of desert conditions in arid regions due to human activities, drought or climate change. ] and leading to drought.
- Constructing a dam on a large river may help provide electricity and water to irrigate farmland near the reservoir. However, it may also cause drought downstream by severely reducing the flow of water.